SPECIFICATION SUBMITTAL SHEET APPLICATION Designed for installation on potable water lines to protect against both backsiphonage and backpressure of polluted water into the potable water supply. The Model 350A shall provide protection where a potential health hazard does not exist. Ideal for use where lead-free* valves are required.
(with BGVIC valves)
(with OSY gates)
STANDARDS COMPLIANCE (Horizontal & Vertical) FEATURES ASSE® Listed 1015 Sizes: 2 1/2" 3" 4" 6" 8" 10" AWWA Compliant C510 (with gates only), and C550 Maximum working water pressure 175 PSI IAPMO® Listed Maximum working water temperature 140˚F CSA® Certified Hydrostatic test pressure 350 PSI UL® Classified End connections C-UL® Classified (Grooved for steel pipe) AWWA C606 FM® Approved (Flanged) ANSI B16.1 NYC MEA 220-04-M Vol 2 (2 1/2" - 8") Class 125 Approved by the Foundation for Cross Connection OPTIONS (Suffixes can be combined) Control and Hydraulic Research at the University of - with flanged end NRS gate valves (standard) Southern California FSC - with epoxy coated wye type strainer (flanged only) NSF® Listed-Standard 61, Annex G* G - with grooved end NRS gate valves *(0.25% MAX. WEIGHTED AVERAGE LEAD CONTENT) GF - with grooved inlet gate connection and flanged outlet gate connection MATERIALS FG - with flanged inlet gate connection and grooved Main valve body Ductile Iron ASTM A 536 Grade 4 outlet gate connection Access covers Ductile Iron ASTM A 536 Grade 4 L - less shut-off valves (grooved body connections) Coatings FDA Approved electrostatic epoxy OSY - with flanged end OS&Y gate valves finish OSYG - with grooved end OS&Y gate valves Internals Stainless steel, 300 Series PI - with Post Indicator Gate Valves NORYL™, NSF Listed BGVIC - with grooved end butterfly valves with integral Fasteners & springs Stainless Steel, 300 Series supervisory switches Seal ring EPDM (FDA approved) ACCESSORIES O-ring Buna Nitrile (FDA approved) Repair kit (rubber only) Thermal expansion tank (Model XT) MODEL 350A OS & Y Gate valve tamper switch (OSY-40) with OSY & E Test Cock Lock (Model TCL24) FSC option
DIMENSIONS & WEIGHTS (do not include pkg.) WEIGHT MODEL SIZE
in. 2 1/2 3 4 6
mm 65 80 100 150
WITH OS&Y GATES (GXG)
WITHOUT WITH NRS GATES GATES (GXF)
WITH OS&Y WITH NRS GATES GATES (GXF) (GXG)
lbs. kg lbs. kg 90 41 184 83.5 89 40.5 204 92.5 76 34.5 220 100 126 57.2 346 157
lbs. 192 210 230 362
kg 87 95.3 104 164
lbs. 176 194 194 316
kg 80 88 88 143
762
335
738
335 738 335
335
F
WITH BUTTERFLY VALVES (GXG)
lbs. kg lbs. kg 184 83.5 108.8 49.4 200 90.8 109.4 50 204 93 108 49 332 151 178 81
TYPICAL INSTALLATION Local codes shall govern installation requirements. Unless otherwise specified, the assembly shall be mounted at a minimum of 12" (305mm) and a maximum of 30" (762mm) above adequate drains with sufficient side clearance for testing and maintenance. The installation shall be made so that no part of the unit can be submerged.
SPECIFICATIONS The Double Check Backflow Prevention Assembly shall be ASSE® Listed 1015, and supplied with full port gate valves. The main body and access cover shall be epoxy coated ductile iron (ASTM A 536 Grade 4), the seat ring and check valve shall be NORYL™, the stem shall be stainless steel (ASTM A 276) and the seat disc elastomers shall be EPDM. The checks shall be accessible for maintenance without removing the device from the line. The Double Check Backflow Prevention Assembly shall be a WILKINS Model 350A. WILKINS a Zurn company, 1747 Commerce Way, Paso Robles, CA 93446 Phone:805-238-7100 Fax:805-238-5766 IN CANADA: ZURN INDUSTRIES LIMITED, 3544 Nashua Dr., Mississauga, Ontario L4V 1L2 Phone:905-405-8272 Fax:905-405-1292 Product Support Help Line: 877-BACKFLOW (877-222-5356) • Website: http://www.zurn.com